<template>
  <div>
    <ul>
      <li v-for="item in arr" :key="item">{{item}}</li>
    </ul>
    <button @click="goAway">走一走</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      arr: ['帅哥', '美女', '程序员'],
      temp: null
    }  
  },
  methods: {
    goAway() {
      // this.arr.push(this.arr[0]);
      this.arr.splice(3,0,this.arr[0]);
      this.arr.splice(0, 1);
    }
  }
}
</script>

<style>

</style>